Olufsen, Ole. “Ecuador. Its Ancient and Modem History, Topography and Natural Resources, Industries and Social Development, by C. Reginald Enock. With 37 Illustrations and 2 Maps. T. Fisher, Unvin London”. Geografisk Tidsskrift - Danish Journal of Geography 25 (January 1, 1920). Accessed December 5, 2025. https://tidsskrift.dk/geografisktidsskrift/article/view/47095.